alpha-fetoprotein

Definition of alpha-fetoprotein
National Cancer Institute

alpha-fetoprotein

(AL-fuh-FEE-toh-PROH-teen)
A protein normally produced by a fetus. Alpha-fetoprotein levels are usually undetectable in the blood of healthy adult men or women (who are not pregnant). An elevated level of alpha-fetoprotein suggests the presence of either a primary liver cancer or germ cell tumor. Also called AFP.

Source: NCI Dictionary of Cancer Terms